This CL moves the functionality in VideoSender into VideoStreamEncoder
and simplifies the code where possible, given what we know of the
encoder state and that we now run on the encoder queue.
The intent here is to make it easier to remove the next parts, the
encoder database and generic encoder wrapper.
Bug: webrtc:10164
Change-Id: I8c108ccbe5db97cd9fd1e84228134709af845ea3
Reviewed-on: https://webrtc-review.googlesource.com/c/123540
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26813}
d7329ca570